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Math Square
This game is more a logic game than a math game, but it does use addition, so we have included it here. In the FAQs I describe where I drew the game from, so I won't repeat all that here. The game comes in versions from easy to hard, and there is an option, on by default, to show the numbers used to derive the answer that can be turned off in the hardest mode to make it almost impossible. Select the level of play, and have fun.
